CN113424611A

CN113424611A - Multi-cell positioning

Info

Publication number: CN113424611A
Application number: CN201980092108.9A
Authority: CN
Inventors: R·基廷; 陶涛
Original assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Current assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2021-09-21
Anticipated expiration: 2039-02-15
Also published as: CN113424611B; EP3925330A4; EP3925330A1; BR112021016036A2; US20220128684A1; WO2020164124A1

Abstract

Embodiments of the present disclosure relate to methods, apparatuses, devices and computer-readable storage media for multi-cell positioning. In an example embodiment, a method is provided. The method includes transmitting a first reference signal from a first network device to a terminal device served by a second network device. The method also includes receiving a second reference signal from a second network device. The method also includes determining a first time difference between a time at which the first RS is transmitted and a time at which the second reference signal is received. Further, the method includes sending information about the first time to a location server. In this way, the location server can determine positioning information about the terminal device.

Description

Multi-cell positioning

Technical Field

Embodiments of the present disclosure relate generally to the field of communications, and, in particular, to methods, devices, apparatuses, and computer-readable storage media for multi-cell positioning.

Background

The ability of devices in wireless networks to sense their location continues to be an important feature. Some devices in the network (such as the gNB) may have perceived their location, while some devices may not (such as the UE). Positioning protocols in wireless networks typically rely on timing-based techniques, angle-based techniques, or hybrid techniques. One timing-based technique is based on round trip time (RRT) estimation. The location of the UE may be determined if RRTs between the UE and the multiple gnbs are estimated. In the latest 3GPP specifications (release 16), it has been agreed to support multi-cell RRT based positioning in new radio access (NR). Compared with other time-based techniques, the RRT-based positioning method is not affected by synchronization errors.

In multi-cell RRT based positioning, neighbor cell RRTs need to be estimated through Downlink (DL) and Uplink (UL) signaling exchange procedures. In particular, the neighboring cells need to estimate the reception time by measuring UL Reference Signals (RSs) from the terminal device, such as a UE. However, the audibility of UL signals can be challenging for remote neighboring cells due to low transmit power. Furthermore, in some scenarios, there may be a large difference between DL and UL link budgets. The link budget difference further reduces the audibility of the UL signal compared to DL signaling. In addition to the difference in link budget, the terminal device may also beamform its transmissions. The detectability of UL signaling may be further reduced without proper beam management between the terminal device and the neighboring cells.

Disclosure of Invention

In general, example embodiments of the present disclosure provide methods, apparatuses, devices and computer-readable storage media for multi-cell positioning.

In a first aspect, there is provided a method comprising: transmitting a first Reference Signal (RS) from a first network device to a terminal device served by a second network device; receiving a second RS from a second network device; determining a first time difference between a time when the first RS is transmitted and a time when the second RS is received; and sending information about the first time difference to a location server.

In a second aspect, there is provided a method comprising: receiving, at a terminal device, a first Reference Signal (RS) from a first network device; transmitting a third RS to a second network device serving the terminal device; determining a second time difference between a time when the first RS is received and a time when the third RS is transmitted; and sending information about the second time difference to a location server.

In a third aspect, there is provided a method comprising: receiving, at a second network device serving the terminal device, a third Reference Signal (RS) from the terminal device; sending a second RS to the first network equipment; determining a fourth time difference between a time when the third RS is received and a time when the second reference signal is transmitted; and sending information about the fourth time difference to the location server.

In a fourth aspect, there is provided a method comprising: obtaining, from a first network device, information about a first time difference between a time at which the first network device transmits a first Reference Signal (RS) to a terminal device served by a second network device and a time at which the first network device receives a second RS from the second network device; obtaining, from the terminal device, information on a second time difference between a time when the terminal device receives the first RS from the first network device and a time when the terminal device transmits the third RS to the second network device; obtaining information about a fourth time difference from the second network device, the fourth time difference being between a time when the second network device receives the third RS from the terminal device and a time when the second network device transmits the second RS to the first network device; and determining positioning information about the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

In a fifth aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the method according to the first aspect.

In a sixth aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the method according to the second aspect.

In a seventh aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the method according to the third aspect.

In an eighth aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the method according to the fourth aspect.

In a ninth aspect, there is provided an apparatus comprising: means for performing the method of the first, second, third or fourth aspect.

In a tenth aspect, a computer-readable storage medium is provided on which a computer program is stored. The computer program, when executed by a processor of an apparatus, causes the apparatus to perform the method according to the first, second, third or fourth aspect.

It should be understood that this summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become readily apparent from the following description.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following more detailed description of some embodiments of the present disclosure, as illustrated in the accompanying drawings, in which:

fig. 1 illustrates a schematic diagram of a communication system according to an embodiment of the present disclosure;

fig. 2 illustrates a signaling diagram according to an embodiment of the disclosure;

fig. 3 illustrates a signaling diagram according to an embodiment of the disclosure;

fig. 4 illustrates a signaling diagram according to an embodiment of the disclosure;

FIG. 5 illustrates a flow diagram of an example method in accordance with an embodiment of the present disclosure;

FIG. 6 illustrates a flow diagram of an example method in accordance with an embodiment of the present disclosure;

FIG. 7 illustrates a flow diagram of an example method in accordance with an embodiment of the present disclosure;

FIG. 8 illustrates a flow diagram of an example method in accordance with an embodiment of the present disclosure; and

fig. 9 is a simplified block diagram of a device suitable for implementing embodiments of the present disclosure.

Throughout the drawings, the same or similar reference numerals denote the same or similar elements.

Detailed Description

The principles of the present disclosure will now be described with reference to a few exemplary embodiments. It is understood that these embodiments are described merely to illustrate and assist those skilled in the art in understanding and practicing the present disclosure, and do not set forth any limitation on the scope of the present disclosure. The disclosure described herein may be implemented in various ways other than those described below.

In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

References in the present disclosure to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not properly described.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the listed terms.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used herein, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

As used in this application, the term "circuitry" may refer to one or more or all of the following:

(a) hardware-only circuit implementations (e.g. implementations in only analog and/or digital circuit arrangements), and

(b) a combination of hardware circuitry and software, such as (as applicable):

(i) combinations of analog and/or digital hardware circuit(s) and software/firmware, and

(ii) hardware processor(s) with software (including digital signal processor (s)), software, and any portion of memory(s) work together to cause a device such as a mobile phone or server to perform various functions, and

(c) hardware circuit(s) and/or processor(s), such as microprocessor(s) or a portion of a microprocessor, that require software (e.g., firmware) for operation, but which may not be present when operation is not required.

This definition of circuitry applies to all uses of this term in this application, including in what claims. As another example, as used in this application, the term circuitry also encompasses implementations in hardware circuitry only or a processor (or multiple processors) or a portion of a hardware circuitry or a processor and/or their accompanying software and/or firmware. The term circuitry also encompasses (e.g., and if applicable to the particular claim element) a baseband integrated circuit or processor integrated circuit for a mobile device or similar integrated circuit in a server, a cellular network device, or other computing or network device.

As used herein, the term "wireless communication network" refers to a network that conforms to any applicable wireless communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-advanced (LTE-a), Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access (HSPA), and the like. A "wireless communication network" may also be referred to as a "wireless communication system". Further, communication between network devices, between a network device and a terminal device, or between terminal devices in a wireless network may be performed according to any applicable communication protocol, including, but not limited to, global system for mobile communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), New Radios (NR), Wireless Local Area Network (WLAN) standards, such as the IEEE 802.11 standard, and/or any other suitable wireless communication standard, whether currently known or to be developed in the future.

As used herein, the term "network device" refers to any suitable device on the network side of a communication network. The network device may comprise any suitable device in an access network of a communication network, e.g. including a node B (NodeB or NB), an evolved node (eNodeB or eNB), a New Radio (NR) NB (also referred to as gNB), a Radio Remote Unit (RRU), a Radio Header (RH), a Remote Radio Head (RRH), a low power node such as a femto, etc., depending on the terminology and technology of the application.

The term "terminal device" refers to any terminal device that may be capable of wireless communication. By way of example, and not limitation, a terminal device may also be referred to as a communication device, User Equipment (UE), a Subscriber Station (SS), a portable subscriber station, a mobile base station (MS), or an Access Terminal (AT). The terminal devices may include, but are not limited to, mobile phones, cell phones, smart phones, voice over IP (VoIP) phones, wireless local loop phones, tablets, wearable terminal devices, Personal Digital Assistants (PDAs), portable computers, desktop computers, image capture terminals such as digital cameras, gaming terminal devices, music storage and playback devices, in-vehicle wireless terminal devices, wireless endpoints, mobile base stations, portable embedded equipment (LEE), portable installation equipment (LME), USB dongles, smart devices, wireless subscriber premises equipment (CPE), and the like. In the following description, the terms "terminal device", "communication device", "terminal", "user equipment" and "UE" may be used interchangeably.

As another example, in an internet of things (IOT) scenario, a terminal device may represent a machine or other device performing monitoring and/or measurements, and send the results of such monitoring and/or measurements to another terminal device and/or network device. The terminal device in this case may be a machine-to-machine (M2M) device, which may be referred to as a Machine Type Communication (MTC) device in the 3GPP context. As one particular example, the terminal device may be a UE implementing the 3GPP narrowband internet of things (NB-IoT) standard. Such machines or devices are sensors, metering devices such as power meters, industrial machinery, or examples of household or personal appliances, e.g., refrigerators, televisions, individuals, etc., wearing such as watches, etc. In other scenarios, the terminal device may represent a vehicle or other apparatus capable of monitoring and/or reporting information regarding its operational status or other functions related to its operation.

In timing based positioning solutions, one factor that plays an important role in performance is the number of audible network devices in the field of interest, such as the environment where some target end devices are located. As used herein, the word "audible" means that the signal quality is sufficiently strong that such a receiving device can make reasonable timing estimates based on the reception. In principle, the positioning error decreases with an increasing number of audible network devices.

As described above, in the multi-cell RRT based positioning method, it is necessary to estimate the neighbor cell RRT through DL and UL signaling exchange steps. More specifically, the neighboring cells need to estimate the reception timing by measuring the UL RS from the UE. However, the audibility of UL signaling can be challenging for remote neighboring cells due to low transmit power. Furthermore, in some scenarios, there may be a large gap between DL and UL link budgets. The link budget difference further reduces the audibility of UL signaling compared to DL signaling. In addition to the link budget difference, the UE may also beamform its transmissions. Without proper beam management between the UE and the neighboring cells, the audibility of UL signaling may be further reduced. In this case, additional UL transmissions may be needed to improve hearability.

Embodiments of the present disclosure provide a solution for multi-cell positioning in order to at least partially address the above and other potential problems. Some example embodiments of the present disclosure will be described below with reference to the accompanying drawings. However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes as the disclosure extends beyond these limited embodiments.

FIG. 1 illustrates an example of a communication network 100 in which embodiments of the present disclosure may be implemented. The communication network 100 comprises a terminal device 110, a serving network device 130 providing a serving cell to serve the terminal device 110, and a neighboring network device 120 providing a neighboring cell. In the following, the neighboring network device 120 may also be referred to as a first network device, and the serving network device 130 may also be referred to as a second network device. It should be understood that the number of network devices, terminal devices and/or cells are given for illustrative purposes and do not represent any limitation of the present disclosure. Communication network 100 may include any suitable number of network devices, terminal devices, and/or cells suitable for implementing implementations of the present disclosure.

As shown in fig. 1, communication network 100 may also include a location server 140, where location server 140 is communicatively coupled to terminal device 110, first network device 120, and second network device 130. The location server 140 is responsible for locating the different devices in the network 100. For example, location server 140 may be a physical or logical entity that collects measurements from terminal devices and network devices as well as other location information, and assists these devices in estimating their locations. The location server 140 may be a separate entity in the core network or reside in a network device or terminal device. In an LTM system, the location server 140 may include an evolved serving mobile location center (E-SMLC) and a Secure User Plane Location (SUPL). In the NR system, the location server 140 may be a Location Management Function (LMF). Although location server 140 is shown as a separate entity from devices 110,120, and 130, it should be understood that in some embodiments, location server 140 may also be implemented in one of devices 110,120, and 130.

Communications in communication system 100 may be implemented in accordance with any suitable communication protocol, including but not limited to first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), and fifth generation (5G), etc., cellular communication protocols, wireless local area network communication protocols such as Institute of Electrical and Electronics Engineers (IEEE)802.11 and the like, and/or any other currently known or future developed protocol. Moreover, the communication may utilize any suitable wireless communication technology, including but not limited to: code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), frequency division multiplexing (FDD), time division multiplexing (TDD), Multiple Input Multiple Output (MIMO), Orthogonal Frequency Division Multiple Access (OFDMA) and/or any other now known or later developed technique.

In accordance with embodiments of the present disclosure, to determine the location of terminal device 110, serving network device 130 may act as a relay for RRT (or propagation delay) estimation between terminal device 110 and neighboring network device 120. Specifically, neighboring network device 120 may send DL signaling to terminal device 110 such that terminal device 110 measures the time of receipt of the DL signal. Terminal device 110 may then transmit the UL signal to serving network device 130, causing serving network device 130 to measure the time of reception of the UL signal. Finally, the serving network device 130 may transmit a signal to the neighboring network device 120 such that the neighboring network device 120 measures the time of receipt of the signal. The terminating network device 110, the serving network device 130 and the neighboring network device 120 may send their measurements to the location server 140.

The location server may estimate the RRT between the terminal device 110 and the neighboring network device 120 or the propagation delay from the neighboring network device 120 to the terminal device 110 based on measurements received from the terminal device 110, the serving network device 130 and the neighboring network device 120. The location server 140 may then use the estimated result for determining positioning information about the terminal device 110.

In this way, the number of audible network devices in the network 100 may be increased. Terminal device 110 need not transmit an UL signal to neighboring network devices 120. Thus, the position accuracy can be improved without requiring large overhead or complex signaling. Furthermore, embodiments of the present disclosure are not affected by synchronization errors as compared to other timing-based positioning techniques, such as observed time of arrival (OTDOA) based techniques, or uplink time difference of arrival (UTDOA).

Fig. 2 is a diagram illustrating a signaling procedure 200 according to an embodiment of the disclosure. For purposes of discussion, the signaling procedure 200 will be described with reference to fig. 1.

As shown in fig. 2, to determine positioning information about terminal device 110, neighboring network device 120 may send 210 an RS to terminal device 110 (also referred to as a "first RS"). The terminal device 110 may receive the first RS from the neighboring network device 120 and determine a reception time of the first RS. The terminal device 110 may send 220 an RS (also referred to as a "third RS") to the serving network device 130. The terminal device 110 may determine a time difference between the reception time of the first RS and the transmission time of the third RS, for example, denoted as "t 2" in fig. 2. Terminal device 110 may send information regarding time difference t2 to location server 140 so that location server 140 may determine positioning information regarding terminal device 110 based at least on time difference t 2.

The serving network apparatus 130 may receive the third RS from the terminal apparatus 110 and determine a reception time of the third RS. The serving network device 130 may send 230 an RS (also referred to as a "second RS") to the neighboring network device 120.

In some embodiments, the second RS transmitted by the serving network device 130 may also be a common signal used for other purposes, such as a Synchronization Signal (SS). In some embodiments, the second RS transmitted by the serving network device may be beamformed, possibly in the direction of the neighboring network device. Alternatively or additionally, in some embodiments, the second RS may be transmitted from the serving network device 130 to both the terminal device 110 and the neighboring network device 120. As will be described below with reference to fig. 3, the second RS sent from the serving network device 130 to the terminal device 110 may also be used to measure the RRT or propagation delay between the terminal device 110 and the serving network device 130.

In some scenarios, for example, network 100 may include multiple neighboring network devices (including, but not limited to, neighboring network device 120). In some embodiments, in this case, the second RS may be transmitted from the serving network device 130 to all of the plurality of neighboring network devices in the network 100. Alternatively, in other embodiments, the second RS may be transmitted from the serving network device 130 to the neighboring network device 120 as long as the neighboring network device 120 cannot hear the UL signal from the terminal device 110 or the received UL signal quality from the terminal device 110 is below a predetermined threshold.

As shown in fig. 2, the serving network apparatus 130 may determine a time difference (also referred to as a "fourth time difference") between the reception time of the third RS and the transmission time of the second RS. For example, the fourth time difference may be denoted by "t 3" in fig. 2. Serving network device 130 may send information regarding time difference t3 to location server 140 so that location server 140 may determine location information regarding terminal device 110 based at least on time difference t 3.

The neighboring network device 120 may receive the second RS from the network service device 130 and determine a reception time of the second RS. The neighboring network device 120 may further determine a time difference (also referred to as a "first time difference") between the transmission time of the first RS and the reception time of the second RS, e.g., as represented by "t 4" in fig. 2. Neighboring network device 120 may send information regarding time difference t4 to location server 140 so that location server 140 may determine positioning information regarding terminal device 110 based at least on time difference t 4.

Upon receiving the time difference t2 from the terminal device 110, the time difference t3 from the serving network device 130, and the time difference t4 from the neighboring network device 120, the location server 14 may estimate the propagation delay from the neighboring network device 120 to the terminal device 110, or the RRT between the neighboring network device 120 and the terminal device 110.

To estimate the propagation delay from the neighboring network device 120 to the terminal device 110, the location server 140 needs to determine the propagation delay from the terminal device 110 to the serving network device 130 and the propagation delay from the serving network device 130 to the neighboring network device 120. In some embodiments, the locations of serving network device 130 and neighboring network device 120 may be known at location server 140. In this case, location server 140 may determine the propagation delay from serving network device 130 to neighboring network device 120 based on their location. Additionally, the propagation delay from terminal device 110 to serving network device 130 may be determined through another signaling exchange procedure (such as shown in fig. three).

Fig. 3 is a diagram illustrating a signaling procedure 300 according to an embodiment of the disclosure. For purposes of discussion, the signaling procedure 300 will be described with reference to fig. 1. The signaling procedure 300 will be used to determine the propagation delay or RRT between the terminal device 110 and the serving network device 130.

As shown in fig. 3, serving network device 130 may send 310 an RS (also referred to as a "fourth RS") to terminal device 110. In some embodiments, the fourth RS transmitted from serving network device 130 to terminal device 110 and the second RS transmitted from serving network device 130 to neighboring network device 120 (shown by 230 in fig. 2) may be the same RS. Alternatively, in other embodiments, the fourth RS and the second RS may be different signals.

The terminal device 110 may receive the fourth RS from the serving network device 130 and determine a reception time of the fourth RS. The terminal device 110 may send 320 the RS (also referred to as "fifth RS") to the serving network device 130. In some embodiments, the fifth RS transmitted from the terminal device 110 to the serving network device 130 and the third RS transmitted from the terminal device 110 to the serving network device 130 may be the same RS. Alternatively, in other embodiments, the fifth RS and the third RS may be different signals. The terminal device 110 may further determine a time difference (also referred to as "third time difference") between the reception time of the fourth RS and the transmission time of the fifth RS, for example, denoted as "t 1" in fig. 3.

The serving network apparatus 130 may receive the fifth RS from the terminal apparatus 110 and determine a reception time of the fifth RS. The serving network apparatus 130 may further determine a time difference (also referred to as "fifth time difference") between the transmission time of the fourth RS and the reception time of the fifth RS, for example, denoted by "t 5" in fig. 3.

Terminal device 110 may send information regarding time difference t1 to location server 140. Also, the serving network device 130 may send information about the time difference t5 to the location server 140. The location server 140 may estimate the RRT or propagation delay between the serving network device 130 and the terminal device 110 based on the time differences t1 and t 5. For example, the RRT between the serving network device 130 and the terminal device 110 may be determined as (t5-t 1). The propagation delay from the terminal device 110 to the serving network device 130 may be determined as (t5-t 1)/2.

In some embodiments, the location server 140 may determine the propagation delay from the neighboring network device 120 to the end device 110 based on the time difference t 1-t 5 and the propagation delay from the serving network device 130 to the neighboring network device 120 (e.g., denoted as "t 6"). For example, the propagation delay from the neighboring network device 120 to the terminal device 110 may be determined as (t4-t3-t2-t6- (t5-t 1)/2). Alternatively, in some embodiments, the location server 140 may determine the RRT between the neighboring network device 120 and the terminal device 110 based on the time difference t 1-t 5 and the propagation delay t6 from the serving network device 130 to the neighboring network device 120. For example, the RRT between the neighboring network device 120 and the terminal device 110 may be determined as (t4-t3-t2-t6- (t5-t1)/2) × 2.

Fig. 4 is a diagram illustrating a global signaling procedure 400 according to an embodiment of the disclosure. For purposes of discussion, the signaling procedure 400 will be described with reference to fig. 1. It should be understood that fig. 4 shows the signaling sequence for illustrative purposes only and does not represent any limitation of the present disclosure. In some embodiments, different signaling sequences than those shown in fig. 4 may be applicable.

The positioning scheme according to embodiments of the present disclosure may be triggered or configured as desired. For example, in some embodiments, the positioning scheme may be triggered in response to location server 140 receiving an indication of a need for high positioning accuracy. Alternatively, in some embodiments, the positioning scheme may be triggered in response to location server 140 receiving an indication that a neighboring network device in the network cannot receive a UL signal from the terminal device or that the UL signal quality received from the terminal device is below a predetermined threshold. Alternatively, in some embodiments, the positioning scheme may be triggered in response to the location server 140 determining that location accuracy needs to be improved.

As shown in fig. 4, in response to the positioning scheme being triggered, the location server 140 may send 410 a request (also referred to as a "third request") for an RRT or propagation delay to the serving network device 130. In response to receiving the third request, serving network device 130 may perform corresponding operations as described above with reference to fig. 2 and 3.

Alternatively or additionally, location server 140 may also send 410 assistance information (also referred to as "third assistance information") to serving network device 130. In some embodiments, the third assistance information may include a configuration (also referred to as a "fourth configuration") for transmitting the second RS from the serving network device 130 to the neighboring network device 120. For example, the fourth configuration may indicate at least one of: time information, frequency information, code information or spatial information of transmission of the second RS with respect to transmission of the second RS. Additionally, the fourth configuration information may indicate a location of the neighboring network device 120 so that the serving network device 130 may determine an optimal spatial direction for the second RS transmission. In response to receiving the third assistance information indicating the fourth configuration, the serving network apparatus 130 may transmit the second RS based on the fourth configuration. The serving network apparatus 130 may also send a response to the third request indicating the configuration information about the second RS to the location server 140. In some embodiments, in response to receiving the third request and the third assistance information, the serving network apparatus 130 responds to the location server 140 with configuration information utilized for the second RS. For example, the configuration information about the second RS may be determined separately from the fourth configuration or based on the fourth configuration and some additional parameters. Alternatively or additionally, in some embodiments, the third assistance information may also indicate a configuration for reporting measurements (also referred to as a "fifth configuration"), such as a time window for reporting time differences, a reporting period, an accuracy of reporting time differences, and so forth. In response to receiving the third assistance information indicating the fifth configuration, the serving network device 130 may report the time difference t3 and/or t5 based on the fifth configuration.

As shown in fig. 4, in response to the positioning scheme being triggered, location server 140 may send 420 a request (also referred to as a "second request") for an RRT or propagation measurement to terminal device 110. In response to receiving the second request, terminal device 110 may perform corresponding operations as described above with reference to fig. 2 and 3.

Alternatively or additionally, location server 140 may also send 420 assistance information (also referred to as "second assistance information") to terminal device 110. In some embodiments, the second assistance information may include a configuration (also referred to as a "third configuration") for reporting the measurement results, such as a time window for reporting the time difference, a reporting period, an accuracy of reporting the time difference, and so on. In response to receiving the second assistance information indicating the third configuration, terminal device 110 may report time difference t1 and/or t2 based on the third configuration.

As shown in fig. 4, in response to the positioning scheme being triggered, location server 140 may send 430 a request (also referred to as a "first request") for RRT or propagation measurement results to neighboring network device 120. In response to receiving the first request, neighboring network device 120 may perform corresponding operations as described above with reference to fig. 2.

Alternatively or additionally, location server 140 may also send 430 assistance information (also referred to as "first assistance information") to neighboring network device 120. In some embodiments, the first assistance information may include a configuration (may also be referred to as a "first configuration") regarding the second RS. In some embodiments, the first configuration may include information for receiving the second RS. For example, the first configuration may indicate at least one of: time information, frequency information, code information or spatial information regarding transmission of the second RS. Additionally, the first configuration may also indicate beamforming information of the serving network device 130 and/or a cell identity of the serving network device 130. Alternatively or additionally, in some embodiments, the first configuration may include information for timing measurements received based on the second RS. For example, the first configuration may indicate an algorithm to be used, a desired accuracy, and the like. In response to receiving the first assistance information indicating the first configuration and the first configuration including information for receiving the second RS, the neighboring network device 120 may receive the second RS based on the first configuration. Additionally, in response to the first assistance information indicating the first configuration and the first configuration including information for timing measurement, the neighboring network device 120 may determine a reception time of the second RS based on the first configuration. Alternatively or additionally, in some embodiments, the first assistance information may also indicate a configuration for reporting measurement results (also referred to as "second configuration"), such as a time window for reporting time differences, a reporting period, an accuracy of reporting time differences, and so on. In response to receiving the first assistance information indicating the second configuration, the neighboring network device 120 may report the time difference t4 based on the second configuration.

As shown in fig. 4, once the request and/or assistance information is sent to neighboring network device 120, terminal device 110, and serving network device 130, signaling process 200 as shown in fig. 2 may be performed. The neighboring network device 120 may then send 440 information regarding the time difference t4 (e.g., based on the first assistance information) to the location server 140. Terminal device 110 may send 450 information regarding time difference t2 (e.g., based on the second assistance information) to location server 140. The serving network device 130 may send 460 information regarding the time difference t3 to the location server 140 (e.g., based on the third assistance information).

As shown in fig. 4, a signaling procedure 300 as shown in fig. 3 may be performed. The terminal device 110 may then send 470 information regarding the time difference t1 (e.g., based on the second assistance information) to the location server 140. The serving network device 130 may send 480 information regarding the time difference t5 to the location server 140 (e.g., based on the third assistance information).

The location server 140 may determine the RRT or propagation delay between the neighboring network device 120 and the terminal device 110 based on the time difference t 1-t 5. Location server 140 may then determine the location of terminal device 110 based on the determined RRT or propagation delay.

As can be seen from the above, embodiments of the present disclosure provide a scheme for multi-cell positioning. This scheme increases the number of audible network devices in the RRT scheme. Since more RRT measurements can be obtained, the position accuracy can be improved. In addition, the terminal device does not need to send UL signaling to neighboring network devices. Thus, the scheme does not require a large amount of overhead or complex signaling. Additionally, embodiments of the present disclosure are not affected by synchronization errors as compared to other time-based positioning techniques, such as OTDOA or UTDOA-based techniques.

Fig. 5 illustrates a flow diagram of a method 500 according to an embodiment of the present disclosure. In the communication network 100, the method 500 may be implemented at the neighboring network device 120. It should be understood that method 500 may also include additional blocks not shown and/or omit some of the blocks shown, and the scope of embodiments of the present disclosure is not so limited.

At block 510, the first network device 120 transmits a first RS to a terminal device served by a second network device.

At block 520, the neighboring network device 120 receives a second RS from the second network device.

At block 530, the neighboring network device 120 determines a first time difference between the time the first RS was transmitted and the time the second RS was received.

At block 540, the neighboring network device 120 sends information regarding the first time difference to the location server.

In some embodiments, sending information about the first time difference comprises: in response to receiving a first request for positioning information from a location server, information regarding a first time difference is sent to the location server.

In some embodiments, the method 500 further comprises receiving first assistance information from the location server, the first assistance information indicating at least one of: a first configuration with respect to the second RS, and a second configuration for reporting the time difference to the location server.

In some embodiments, receiving the second RS comprises: in response to the first assistance information indicating the first configuration and the first configuration including information for receiving the second RS, the second RS is received based on the first configuration.

In some embodiments, determining the first time difference comprises: in response to the first assistance information indicating the first configuration and the first configuration including information for timing measurement, a time at which the second RS is received is determined based on the first configuration.

In some embodiments, sending information about the first time difference comprises: in response to the first assistance information indicating the second configuration, information regarding the first time difference is sent to a location server based on the second configuration.

Fig. 6 illustrates a flow diagram of a method 600 according to an embodiment of the present disclosure. In the communication network 100, the method 200 may be implemented at the terminal device 110. It should be understood that method 600 may also include additional blocks not shown and/or omit some of the blocks shown, and the scope of embodiments of the present disclosure is not so limited.

At block 610, terminal device 110 receives a first RS from a first network device.

At block 620, terminal device 110 transmits a third RS to a second network device serving terminal device 110.

At block 630, terminal device 110 determines a second time difference between the time at which the first RS was received and the time at which the third RS was transmitted.

At block 640, terminal device 110 sends information regarding the second time difference to the location server.

In some embodiments, method 600 further comprises: receiving a fourth RS from the second network device; transmitting a fifth RS to the second network device; determining a third time difference between a time when the fourth RS is received and a time when the fifth RS is transmitted; and sending information about the third time difference to the location server.

In some embodiments, the third RS and the fifth RS are the same RS.

In some embodiments, transmitting the information about the second time difference comprises: in response to receiving a second request for positioning information from the location server, information regarding a second time difference is sent to the location server.

In some embodiments, transmitting information about the third time difference comprises: in response to receiving the second request from the location server, information regarding the third time difference is sent to the location server.

In some embodiments, method 600 further comprises: second assistance information is received from the location server, the second assistance information indicating a third configuration for reporting the time difference to the location server.

In some embodiments, transmitting the information about the second time difference comprises: information regarding the second time difference is sent to the location server based on the third configuration.

Fig. 7 illustrates a flow diagram of a method 700 according to an embodiment of the present disclosure. In the communication network 100, the method 700 may be implemented at the serving network device 130. It should be understood that method 700 may also include additional blocks not shown and/or omit some of the blocks shown, and the scope of embodiments of the present disclosure is not so limited.

At block 710, the serving network apparatus 130 receives, from the terminal apparatus, a third RS at a second network apparatus serving the terminal apparatus.

At block 720, the serving network device 130 transmits the second RS to the first network device.

At block 730, the serving network apparatus 130 determines a fourth time difference between the time the third RS is received and the time the second RS is transmitted.

At block 740, the serving network device 130 sends information regarding the fourth time difference to the location server.

In some embodiments, method 700 further comprises: transmitting a fourth RS from the second network device to the terminal device; receiving a fifth RS from the terminal device; determining a fifth time difference between a time when the fourth RS is transmitted and a time when the fifth RS is received; and sending information about the fifth time difference to the location server.

In some embodiments, the fourth RS and the second RS are the same RS.

In some embodiments, transmitting the information about the second RS includes: in response to receiving a third request for positioning information from the location server, a response is sent to the location server regarding configuration information of the second RS.

In some embodiments, transmitting the second RS comprises: and transmitting the second RS to the first network equipment by performing beam forming on the second RS in the direction of the first network equipment.

In some embodiments, transmitting information about the fourth time difference comprises: in response to receiving the third request from the location server, information regarding the fourth time difference is sent to the location server.

In some embodiments, transmitting information about the fifth time difference comprises: in response to receiving the third request from the location server, information regarding the fifth time difference is sent to the location server.

In some embodiments, method 700 further comprises receiving third assistance information from the location server, the third assistance information indicating at least one of: a fourth configuration for transmitting the second RS, and a fifth configuration for reporting the time difference to the location server.

In some embodiments, transmitting the second RS comprises: and in response to the third assistance information indicating the fourth configuration, transmitting the second RS to the terminal device based on the fourth configuration.

In some embodiments, transmitting information about the fourth time difference comprises: in response to the third assistance information indicating the fifth configuration, information on the fourth time difference is transmitted to the location server based on the fifth configuration.

Fig. 8 illustrates a flow diagram of a method 800 according to an embodiment of the present disclosure. In the communication network 100, the method 800 may be implemented at the location server 140. It should be understood that method 800 may also include additional blocks not shown and/or omit some of the blocks shown, and the scope of embodiments of the present disclosure is not so limited.

At block 810, location server 140 obtains information from a first network device regarding a first time difference between a time at which the first network device transmits a first Reference Signal (RS) to a terminal device served by a second network device and a time at which the first network device receives a second RS from the second network device.

At block 820, location server 140 obtains information from the terminal device regarding a second time difference between a time at which the terminal device received the first RS from the first network device and a time at which the terminal device transmitted the third RS to the second network device.

At block 830, the location server 140 obtains information from the second network device regarding a fourth time difference between a time at which the second network device receives the third RS from the terminal device and a time at which the second network device transmits the second RS to the first network device.

At block 840, location server 140 determines positioning information for the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

In some embodiments, obtaining information about the first time difference comprises: sending a request for positioning information to a first network device; and receiving information about the first time difference from the first network device in response to the first request being sent to the first network device.

In some embodiments, the method 800 further comprises sending first assistance information to the first network device, the first assistance information indicating at least one of: a first configuration with respect to the second RS, and a second configuration for reporting the first time difference to the location server.

In some embodiments, obtaining information about the first time difference comprises: in response to the first assistance information indicating the transmitted second configuration, information regarding the first time difference is received from the first network device based on the second configuration.

In some embodiments, obtaining information about the second time difference comprises: sending a second request for the positioning information to the terminal server; and receiving information about the second time difference from the terminal device in response to the second request being sent to the terminal device.

In some embodiments, the method 800 further comprises: and transmitting second assistance information to the terminal device, the second assistance information indicating a third configuration for transmitting the time difference to the location server.

In some embodiments, obtaining information about the second time difference comprises: information regarding the second time difference is received from the terminal device based on the third configuration.

In some embodiments, obtaining information about the fourth time difference comprises: sending a third request for positioning information to the second network device; and receiving information about the fourth time difference from the second network device in response to the third request being sent to the second network device.

In some embodiments, the method 800 further comprises receiving a response to the third request from the second network device, the response indicating configuration information for the second reference signal.

In some embodiments, the method 800 further comprises sending third assistance information to the second network device, the third assistance information indicating at least one of: a fourth configuration for transmitting the second RS, a fifth configuration for reporting the time difference to the location server.

In some embodiments, obtaining information about the fourth time difference comprises: in response to the third assistance information indicating the transmitted fifth configuration, information regarding a fourth time difference is received from the second network device based on the fifth configuration.

In some embodiments, determining the positioning information about the terminal device comprises: a propagation delay from the first network device to the terminal device is determined based on at least the first time difference, the second time difference, and the fourth time difference.

In some embodiments, determining the positioning information about the terminal device comprises: a first Round Trip Time (RTT) between the first network device and the terminal device is determined based at least on the first time difference, the second time difference, and the fourth time difference.

In some embodiments, determining the positioning information about the terminal device comprises: determining a second RTT between the terminal device and the second network device; and determining positioning information about the terminal device based on the second RTT and the first time difference, the second time difference and the fourth time difference.

In some embodiments, determining the second RTT comprises: obtaining, from the terminal device, a third time difference between a time when the terminal device receives the fourth RS from the second network device and a time when the terminal device transmits the fifth RS to the second network device; obtaining, from the second network device, a fifth time difference between a time when the second network device transmits the fourth RS to the terminal device and a time when the second network device receives the fifth RS from the terminal device; and determining a second RTT between the terminal device and the second network device based on the third and fifth time differences.

In some embodiments, an apparatus capable of performing

methods

500, 600, 700, and/or 800 may include means for performing the respective steps of

methods

500, 600, 700, and/or 800. The components may be implemented in any suitable form. For example, the components may be implemented in a circuit arrangement or a software module.

In some embodiments, the component comprises at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause performance of the apparatus.

In some embodiments, an apparatus capable of performing method 500 comprises: means for transmitting a first Reference Signal (RS) from a first network device to a terminal device served by a second network device; means for receiving a second RS from a second network device; means for determining a first time difference between a time at which the first RS is transmitted and a time at which the second RS is received; and means for sending information regarding the first time difference to a location server.

In some embodiments, the means for transmitting information about the first time difference comprises: means for transmitting information regarding the first time difference to a location server in response to receiving a first request for positioning information from the location server.

In some embodiments, the apparatus capable of performing the method 500 further comprises: means for receiving first assistance information from a location server, the first assistance information indicating at least one of: with respect to the first configuration of the second RS, a second configuration for reporting the time difference to the location server.

In some embodiments, the means for receiving the second RS comprises: means for receiving a second RS based on the first configuration in response to first assistance information indicating the first configuration and the first configuration including information for receiving the second RS.

In some embodiments, the means for determining the first time difference comprises: means for determining a time at which the second RS is received based on the first configuration in response to the first assistance information indicating the first configuration and the first configuration including information for timing measurements.

In some embodiments, the means for transmitting information about the first time difference comprises: means for transmitting information regarding the first time difference to a location server based on the second configuration in response to the first assistance information indicating the second configuration.

In some embodiments, the apparatus capable of performing the method 600 comprises: means for receiving, at a terminal device, a first Reference Signal (RS) from a first network device, means for transmitting a third RS to a second network device serving the terminal device; means for determining a second time difference between a time at which the first RS is received and a time at which the third RS is transmitted; and means for sending information about the second time difference to the location server.

In some embodiments, the apparatus capable of performing the method 600 further comprises: means for receiving a fourth RS from the second network device; means for transmitting a fifth RS to the second network device; means for determining a third time difference between a time when the fourth RS is received and a time when the fifth RS is transmitted; and means for sending information regarding the third time difference to the location server.

In some embodiments, the third RS and the fifth RS are the same RS.

In some embodiments, the means for transmitting information about the second time difference comprises: means for transmitting information regarding the second time difference to the location server in response to receiving a second request for positioning information from the location server.

In some embodiments, the means for transmitting information about the third time difference comprises: means for sending information regarding the third time difference to the location server in response to accepting the second request from the location server.

In some embodiments, the apparatus capable of performing the method 600 further comprises: means for receiving second assistance information from the location server, the second assistance information indicating a third configuration for reporting the time difference to the location server.

In some embodiments, the means for transmitting information about the second time difference comprises: means for sending information regarding the second time difference to the location server based on the third configuration.

In some embodiments, the apparatus capable of performing method 700 comprises: means for receiving a third Reference Signal (RS) from the terminal device at a second network device serving the terminal device; means for transmitting a second RS to the first network device; means for determining a fourth time difference between a time when the third RS is received and a time when the second RS is transmitted; and means for sending information about the fourth time difference to the location server.

In some embodiments, an apparatus capable of performing method 700 further comprises: means for transmitting a fourth RS from the second network device to the terminal device; receiving a fifth RS from the terminal equipment; means for determining a fifth time difference between a time when the fourth RS is transmitted and a time when the fifth RS is received; and means for sending information about the fifth time difference to the location server.

In some embodiments, the fourth RS and the second RS are the same RS.

In some embodiments, the means for transmitting the second RS comprises: means for transmitting a second RS to the first network device in response to receiving a third request for positioning information from the location server; and means for sending a response including the configuration information about the second RS to the location server.

In some embodiments, the means for transmitting the second RS comprises: means for transmitting the second RS to the first network device by forming a beam of the second RS in a direction of the first network device.

In some embodiments, the means for transmitting information about the fourth time difference comprises: means for transmitting information regarding the fourth time difference to the location server in response to receiving the third request from the location server.

In some embodiments, the means for transmitting information about the fifth time difference comprises: means for transmitting information regarding the fifth time difference to the location server in response to receiving the third request from the location server.

In some embodiments, the apparatus capable of performing method 700 further comprises means for receiving third assistance information from the location server, the third assistance information indicating at least one of: a fourth configuration for transmitting the second RS, and a fifth configuration for reporting the time difference to the location server.

In some embodiments, the means for transmitting the second RS comprises: means for transmitting the second RS to the terminal device based on the fourth configuration in response to the third assistance information indicating the fourth configuration.

In some embodiments, the means for transmitting information about the fourth time difference comprises: means for transmitting information about a fourth time difference to the location server based on the fifth configuration in response to the third assistance information indicating the fifth configuration.

In some embodiments, the apparatus capable of performing method 800 comprises: means for obtaining information about a first time difference from a first network device, the first time difference being between a time when the first network device transmits a first Reference Signal (RS) to a terminal device served by a second network device and a time when the first network device receives a second RS from the second network device; means for obtaining information about a second time difference between a time when the terminal device receives the first RS from the first network device and a time when the terminal device transmits the third RS to the second network device from the terminal device; means for obtaining information about a fourth time difference from the second network device, the fourth time difference being between a time when the second network device receives the third RS from the terminal device and a time when the second network device transmits the second RS to the first network device; and means for determining positioning information about the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

In some embodiments, the means for obtaining information about the first time difference comprises: the first network device is used for sending a first request for positioning information to the first network device; means for receiving information about the first time difference from the first network device in response to the first request being sent to the first network device.

In some embodiments, an apparatus capable of performing method 800 further comprises: means for transmitting first assistance information to a first network device, the first assistance information indicating at least one of: a first configuration with respect to the second RS, and a second configuration for reporting the time difference to the location server.

In some embodiments, the means for obtaining information about the first time difference comprises: means for receiving information regarding the first time difference from the first network device based on the second configuration in response to the transmitted first assistance information indicating the second configuration.

In some embodiments, the means for obtaining information about the second time difference comprises: means for sending a second request for positioning information to the terminal device; and means for receiving information about the second time difference from the terminal device in response to the second request sent to the terminal device.

In some embodiments, an apparatus capable of performing method 800 further comprises: means for transmitting second assistance information to the terminal device, the second assistance information indicating a third configuration for reporting the time difference to the location server.

In some embodiments, the means for obtaining information about the second time difference comprises: means for receiving information about the second time difference from the terminal device based on the third configuration.

In some embodiments, an apparatus capable of performing method 800 further comprises: means for transmitting, to the second network device, a third request to transmit the second RS from the second network device to the first network device; and means for receiving a response to the third request from the second network device, the response indicating configuration information about the second RS.

In some embodiments, the means for obtaining information about the fourth time difference comprises: means for sending a third request for positioning information to a second network device; and means for receiving information about the fourth time difference from the second network device in response to the third request being sent to the second network device.

In some embodiments, the apparatus capable of performing method 800 further comprises means for receiving a response to the third request from the second network device, the response indicating configuration information for the second reference signal.

In some embodiments, the apparatus capable of performing method 800 further comprises means for sending third reference information to the second network device, the third reference information indicating at least one of: a fourth configuration for transmitting the second RS, and a fifth configuration for reporting the time difference to the location server.

In some embodiments, the means for obtaining information about the fourth time difference comprises: for receiving information on a fourth time difference from the second network device based on the fifth configuration in response to the third assistance information indicating the transmitted fifth configuration.

In some embodiments, the means for determining positioning information about the terminal device comprises: means for determining a propagation delay from the first network device to the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

In some embodiments, the means for determining positioning information about the terminal device comprises: means for determining a first RTT between the first network device and the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

In some embodiments, the means for determining positioning information about the terminal device comprises: means for determining a second RTT between the terminal device and a second network device; and means for determining positioning information about the terminal device based on the second RTT and the first time difference, the second time difference and the fourth time difference.

In some embodiments, the means for determining the second RTT comprises: means for obtaining, from the terminal device, a third time difference between a time when the terminal device receives the fourth RS from the second network device and a time when the terminal device transmits the fifth RS to the second network device; means for obtaining, from the second network device, a fifth time difference between a time at which the second network device transmits the fourth RS to the terminal device and a time at which the second network device receives the fifth RS from the terminal device; and means for determining a second RRT between the terminal device and the second network device based on the third and fifth time differences.

Fig. 9 is a simplified block diagram of a device 900 suitable for implementing embodiments of the present disclosure. Device 900 may be used to implement terminal device 110, neighboring network device 120, serving network device 130, or location server as shown in fig. 1.

As shown, the device 900 includes a processor 910, a memory 920 coupled to the processor 910, a suitable Transmitter (TX) and Receiver (RX)940 coupled to the processor 910, and a communication interface coupled to the TX/RX 940. Memory 920 stores at least a portion of program 930. TX/RX940 is for bi-directional communication. TX/RX940 has at least one antenna that facilitates communication, although in practice there may be multiple access nodes mentioned in this application. The communication interface may represent any interface necessary for communicating with other network elements.

The program 930 is assumed to include program instructions that, when executed by the associated processor 910, enable the device 900 to operate in accordance with implementations of the present disclosure, as discussed herein with reference to fig. 1 through 8. Implementations herein may be through computer software executable by the processor 910 of the device 900, or through hardware, or through a combination of software and hardware. The processor 910 may be configured to implement various implementations of the present disclosure. Further, the combination of the processor 910 and the memory 920 may form a processing component 950 suitable for implementing various implementations of the present disclosure.

The memory 920 may be of any type suitable for use in a local technology network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable medium, a semiconductor based storage device, a magnetic storage device and system, an optical storage device and system, a fixed memory and a removable memory, as non-limiting examples. Although only one memory 920 is shown in device 900, there may be multiple physically distinct memory modules in device 900. The processor 910 may be of any type suitable for use in a local technology network, and may include one or more of general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs) and processors based on a multi-core processing architecture, as non-limiting examples. Device 900 may have multiple processors, such as application-specific integrated circuit chips, that are subordinate in time to the clock of the synchronous host processor.

The components included in the apparatus and/or devices of the present disclosure may be implemented in various ways, including software, hardware, firmware, or any combination thereof. In one embodiment, one or more cells may be implemented using software and/or firmware, for example, machine-executable instructions stored in a storage medium. Some or all of the elements in an apparatus and/or device may be implemented, at least in part, by one or more hardware logic components in addition to or in place of machine-executable instructions. For example, and without limitation, descriptions of the types of hardware logic components that may be used include Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), System On Chips (SOCs), Complex Programmable Logic Devices (CPLDs), and the like.

In general, the various embodiments of the disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computer device. While various aspects of the embodiments of the disclosure have been illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that the block diagrams, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computer equipment, or some combination thereof.

The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer product includes computer executable instructions, such as those included in program modules, that are executed in a device on a target real or virtual processor to perform the method 500 discussed above with reference to fig. 5, the method 600 discussed above with reference to fig. 6, the method 700 discussed above with reference to fig. 7, and/or the method 800 discussed above with reference to fig. 8. Generally, program modules include routines, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functionality of the program modules may be combined or separated between program modules as desired. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed fashion, program modules may be located in both local and remote memory storage media.

Program code for performing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the functions/acts specified in the flowchart and/or block diagram are performed by the processor or controller. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this embodiment, the computer program code or associated data may be carried by any suitable carrier for causing a device, apparatus or processor to perform various procedures and operations described above. Examples of the carrier include a signal, a computer readable medium.

The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Examples of a more specific computer-readable medium may include an electronic connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

For the purposes of the present disclosure as set forth above, it should be noted that,

the method steps may be implemented as software code portions and run using a processor at a network element or terminal (as examples of devices, apparatuses and/or modules, or as examples of entities including apparatuses and/or modules), the software code being independent and capable of being specified using any known or future developed programming language as long as the functionality defined by the method steps is preserved.

In general, any method step is suitable to be implemented as software or by hardware, without changing the idea of the invention in terms of implementing functions;

the method steps and/or the device, unit or method may be implemented as hardware components on the above defined apparatus or any module thereof, (e.g. the device performs the function of the apparatus according to the above embodiments, eNode-B as described in the above figures) hardware alone and may be implemented using any known or future developed hardware technology or any mixture thereof, such as MOS (metal oxide semiconductor), CMOS (complementary MOS), BiMOS (bipolar MOS), BiCMOS (bipolar CMOS), ECL (transmission coupled logic), TTL (transistor-transistor logic), etc. Using, for example, ASIC (application specific IC (integrated circuit)) components, FPGA (field programmable gate array) components, CPLD (complex programmable logic device) components or DSP (digital signal processor) components;

a device, cell or component (an apparatus as defined above, or one of any of their respective components) may be implemented as an individual device, cell or component, but this does not exclude that they are implemented in a distributed manner throughout the system as long as the functionality of the device, unit or component is preserved.

An apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such a chip or chipset; this does not exclude the possibility, however, that the functions of a device or module are implemented as software, rather than as hardware, in a (software) module such as a computer program or a computer program product comprising executable software code portions for executing/running on a processor.

The device may be seen as an assembly of one or more apparatuses, e.g. whether functionally in cooperation with each other or functionally independently of each other but in the same device housing.

It should be noted that the above-described embodiments and examples are for illustrative purposes only and are in no way intended to limit the present invention thereto. On the contrary, it is intended to cover all the subject matters and modifications within the spirit and scope of the terms of the appended claims.

Further, while operations are described in a particular order, it should not be understood that these operations are required to be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some environments, multitasking and parallel processing may be advantageous. Likewise, while some specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of a single embodiment can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the example claims.

Various embodiments of the technology have been described. In addition to or as an alternative to the above, the following examples are described. Features described in any of the examples below may be used with any of the other examples described herein.

Claims

1. A method, comprising:

transmitting a first reference signal from a first network device to a terminal device served by a second network device;

receiving a second reference signal from the second network device;

determining a first time difference between a time at which the first reference signal is transmitted and a time at which the second reference signal is received; and

sending information regarding the first time difference to a location server.

2. The method of claim 1, wherein sending the information about the first time difference comprises:

in response to receiving a first request for positioning information from the location server, sending the information regarding the first time difference to the location server.

3. The method of claim 1, further comprising:

receiving first assistance information from the location server, the first assistance information indicating at least one of:

a first configuration with respect to the second reference signal, an

A second configuration for reporting a time difference to the location server.

4. The method of claim 3, wherein receiving the second reference signal comprises:

receiving the second reference signal based on the first configuration in response to the first assistance information indicating the first configuration and the first configuration including information for receiving the second reference signal; and is

Wherein determining the first time difference comprises:

in response to the first assistance information indicating the first configuration and the first configuration including information for timing measurements, determining the time at which the second reference signal is received based on the first configuration.

5. The method of claim 3, wherein sending the information about first time difference comprises:

in response to the first assistance information indicating the second configuration, sending the information regarding the first time difference to the location server based on the second configuration.

6. A method, comprising:

receiving, at a terminal device, a first reference signal from a first network device;

transmitting a third reference signal to a second network device serving the terminal device;

determining a second time difference between a time at which the first reference signal is received and a time at which the third reference signal is transmitted; and

sending information about the second time difference to a location server.

7. The method of claim 6, further comprising:

receiving a fourth reference signal from the second network device;

transmitting a fifth reference signal to the second network device;

determining a third time difference between a time the fourth reference signal is received and a time the fifth reference signal is transmitted; and

sending information regarding the third time difference to the location server.

8. The method of claim 7, wherein the third reference signal and the fifth reference signal are the same reference signal.

9. The method of claim 7, wherein sending the information about the second time difference comprises:

in response to receiving a second request for positioning information from the location server, sending the information regarding the second time difference to the location server.

10. The method of claim 9, wherein sending the information regarding the third time difference comprises:

sending the information regarding the third time difference to the location server in response to receiving the second request from the location server.

11. The method of claim 6, further comprising:

receiving second assistance information from the location server, the second assistance information indicating a third configuration for reporting a time difference to the location server.

12. The method of claim 11, wherein sending the information about the second time difference comprises:

sending the information regarding the second time difference to the location server based on the third configuration.

13. A method, comprising:

receiving, at a second network device serving a terminal device, a third reference signal from the terminal device;

transmitting a second reference signal to the first network device;

determining a fourth time difference between a time the third reference signal is received and a time the second reference signal is transmitted; and

sending information about the fourth time difference to a location server.

14. The method of claim 13, further comprising:

transmitting a fourth reference signal from the second network device to the terminal device;

receiving a fifth reference signal from the terminal device;

determining a fifth time difference between a time the fourth reference signal is transmitted and a time the fifth reference signal is received; and

sending information regarding the fifth time difference to the location server.

15. The method of claim 14, wherein the fourth reference signal and the second reference signal are the same reference signal.

16. The method of claim 13, wherein transmitting the second reference signal comprises:

in response to receiving a third request for positioning information from the location server,

transmitting the second reference signal to the first network device; and

sending a response to the location server including configuration information regarding the second reference signal.

17. The method of claim 13, wherein transmitting the second reference signal comprises:

transmitting the second reference signal to the first network device by beamforming the second reference signal in a direction of the first network device.

18. The method of claim 16, wherein sending the information regarding the fourth time difference comprises:

sending the information regarding the fourth time difference to the location server in response to receiving a third request from the location server.

19. The method of claim 16, wherein sending the information regarding the fifth time difference comprises:

sending the information regarding the fifth time difference to the location server in response to receiving the third request from the location server.

20. The method of claim 13, further comprising:

receiving third assistance information from the location server, the third assistance information indicating at least one of:

a fourth configuration for transmitting the second reference signal, an

A fifth configuration for reporting a time difference to the location server.

21. The method of claim 20, wherein transmitting the second reference signal comprises:

in response to the third assistance information indicating the fourth configuration, transmitting the second reference signal to the terminal device based on the fourth configuration.

22. The method of claim 20, wherein sending the information about a fourth time difference comprises:

in response to the third assistance information indicating the fifth configuration, send the information regarding the fourth time difference to the location server based on the fifth configuration.

23. A method, comprising:

obtaining information from a first network device regarding a first time difference between a time at which the first network device transmits a first reference signal to a terminal device served by a second network device and a time at which the first network device receives a second reference signal from the second network device;

obtaining information from the terminal device regarding a second time difference between a time at which the terminal device receives the first reference signal from the first network device and a time at which the terminal device transmits a third reference signal to the second network device;

obtaining information from the second network device regarding a fourth time difference between a time at which the second network device receives the third reference signal from the terminal device and a time at which the second network device transmits the second reference signal to the first network device; and

determining positioning information about the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

24. The method of claim 23, wherein obtaining the information about the first time difference comprises:

sending a first request for positioning information to the first network device; and

receiving the information regarding the first time difference from the first network device in response to the first request being sent to the first network device.

25. The method of claim 23, further comprising:

transmitting first assistance information to the first network device, the first assistance information indicating at least one of:

a first configuration with respect to the second reference signal, an

A second configuration for reporting a time difference to the location server.

26. The method of claim 25, wherein obtaining the information about the first time difference comprises:

receiving the information regarding the first time difference from the first network device based on the second configuration in response to the first assistance information indicating the second configuration being sent.

27. The method of claim 23, wherein obtaining the information about the second time difference comprises:

sending a second request for positioning information to the terminal equipment; and

receiving the information about the second time difference from the terminal device in response to the second request being sent to the terminal device.

28. The method of claim 23, further comprising:

sending second assistance information to the terminal device, the second assistance information indicating a third configuration for reporting a time difference to the location server.

29. The method of claim 28, wherein obtaining the information about the second time difference comprises:

receiving the information about the second time difference from the terminal device based on the third configuration.

30. The method of claim 23, wherein obtaining the information about the fourth time difference comprises:

sending a third request for positioning information to the second network device; and

receiving the information regarding the fourth time difference from the second network device in response to the third request being sent to the second network device.

31. The method of claim 30, further comprising:

receiving a response to the third request from the second network device, the response indicating configuration information regarding the second reference signal.

32. The method of claim 23, further comprising:

transmitting third assistance information to the second network device, the third assistance information indicating at least one of:

a fourth configuration for transmitting the second reference signal, an

A fifth configuration for reporting a time difference to the location server.

33. The method of claim 32, wherein obtaining the information about the fourth time difference comprises:

receiving the information regarding the fourth time difference from the second network device based on the fifth configuration in response to the third assistance information indicating the fifth configuration being sent.

34. The method of claim 23, wherein determining the positioning information about the terminal device comprises:

determining a propagation delay from the first network device to the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

35. The method of claim 23, wherein determining the positioning information about the terminal device comprises:

determining a first round trip time between the first network device and the terminal device based on at least the first time difference, the second time difference, and the fourth time difference.

36. The method of claim 23, wherein determining the positioning information about the terminal device comprises:

determining a second round trip time between the terminal device and the second network device; and

determining the positioning information about the terminal device based on the second round trip time and the first, second, and fourth time differences.

37. The method of claim 36, wherein determining the second round trip time comprises:

obtaining, from the terminal device, a third time difference between a time when the terminal device receives a fourth reference signal from the second network device and a time when the terminal device transmits a fifth reference signal to the second network device;

obtaining a fifth time difference from the second network device, the fifth time difference being between a time at which the second network device transmits the fourth reference signal to the terminal device and a time at which the second network device receives a fifth reference signal from the terminal device; and

determining the second round trip time between the terminal device and the second network device based on the third time difference and the fifth time difference.

38. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform the method of any of claims 1-5.

39. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform the method of any of claims 6 to 12.

40. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform the method of any of claims 13 to 22.

41. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform the method of any of claims 23 to 37.

42. An apparatus, comprising:

means for transmitting a first reference signal from a first network device to a terminal device served by a second network device;

means for receiving a second reference signal from the second network device;

means for determining a first time difference between a time at which the first reference signal is transmitted and a time at which the second reference signal is received; and

means for sending information regarding the first time difference to a location server.

43. An apparatus, comprising:

means for receiving, at a terminal device, a first reference signal from a first network device;

means for transmitting a third reference signal to a second network device serving the terminal device;

means for determining a second time difference between a time at which the first reference signal is received and a time at which the third reference signal is transmitted; and

means for transmitting information about the second time difference to a location server.

44. An apparatus, comprising:

means for receiving, at a second network device serving a terminal device, a third reference signal from the terminal device;

means for transmitting a second reference signal to the first network device;

means for determining a fourth time difference between a time at which the third reference signal is received and a time at which the second reference signal is transmitted; and

means for sending information about the fourth time difference to a location server.

45. An apparatus, comprising:

means for obtaining information about a first time difference from a first network device, the first time difference being between a time at which the first network device transmits a first reference signal to a terminal device served by a second network device and a time at which the first network device receives a second reference signal from the second network device;

means for obtaining information from the terminal device regarding a second time difference between a time at which the terminal device receives the first reference signal from the first network device and a time at which the terminal device transmits a third reference signal to the second network device;

means for obtaining information from the second network device regarding a fourth time difference between a time at which the second network device receives the third reference signal from the terminal device and a time at which the second network device transmits the second reference signal to the first network device; and

means for determining positioning information about the terminal device based at least on the first time difference, the second time difference, and the fourth time difference.

46. A computer readable storage medium comprising program instructions stored thereon that, when executed by a processor of a device, cause the device to:

receiving a second reference signal from the second network device;

sending information regarding the first time difference to a location server.

47. A computer readable storage medium comprising program instructions stored thereon that, when executed by a processor of a device, cause the device to:

sending information about the second time difference to a location server.

48. A computer readable storage medium comprising program instructions stored thereon that, when executed by a processor of a device, cause the device to:

transmitting a second reference signal to the first network device;

sending information about the fourth time difference to a location server.

49. A computer readable storage medium comprising program instructions stored thereon that, when executed by a processor of a device, cause the device to: